Damon Q自锁托槽在安氏Ⅲ类错不拔牙矫治中的应用

Application of Damon Q self-ligating bracket in non-extraction orthodontic treatment of patients with class Ⅲ malocclusion

目的探讨Damon Q自锁托槽控制安氏Ⅲ类错患者上切牙转矩的临床疗效。方法收集32例安氏Ⅲ类错患者,分别使用Damon Q自锁托槽(试验组)和Gemini MBT托槽(对照组)进行不拔牙矫治,在矫治前后进行头影测量分析,比较2组患者矫治前后上下切牙倾斜度和面部软组织侧貌的变化。结果矫治后,试验组SNA、ANB、U1-SN、U1-NA、U1-L1、A'Ls-FH的变化与对照组相比,差异均具有统计学意义(P<0.05)。结论使用Damon Q自锁托槽矫治安氏Ⅲ类错,可以有效地控制上切牙根唇向转矩,减小上切牙唇倾度,改善软组织侧貌美观。

Objective To probe the clinical effect of the torque control of upper incisors by Damon Q self-ligating bracket in classⅢmalocclusion cases.Methods Thirty-two patients with class Ⅲ malocclusion were divided into two groups randomly.Damon Q self-ligating bracket and Gemini MBT brackets were applied respectively in the non-extraction treatment of these patients.The lateral X-ray cephalometric images taken before and after the treatment were analyzed to discuss the changes of position of upper and lower incisors and soft tissues.Results There was statistical differences be-tween SNA, ANB, U1-SN, U1-NA, U1-L1 angle and A′Ls-FH of control group and experimental group （P〈0.05）. Conclusion Using Damon Q self-ligating bracket is an effective approach to control labial root torque of upper incisor and improve soft tissue aesthetics in classⅢmalocclusion cases.